Knaack Job Site Storage Chest Box 57.5 Cu Ft 72" Storagemaster Model 90-KLKnaack Job Site Storage Chest Box 57. 5 Cu Ft 72" Storagemaster Model 90 KL The Model 90 KL STORAGEMASTER Piano Box provides a complete storage solution for tools, supplies, and other materials. Measuring 72in wide and 78in high when open (49in when closed), this job box offers 57. 5 cu ft of storage for all trades. Full width interior shelves enable you to organize and protect tools, and the bi fold cover opens upwards and folds completely out of the